Single-stage compressor impeller lifting device capable of adjusting levelness and adjusting method

Abstract

The invention discloses a single-stage compressor impeller hoisting device capable of adjusting the levelness and an adjusting method. The single-stage compressor impeller hoisting device comprises an impeller, a levelness adjusting device assembly and a fixing device assembly. Inclined impeller grooves are formed in the circumferential surface of the impeller at equal intervals, and blades are arranged on the impeller grooves; the fixing device assembly comprises a locking block arranged in the impeller groove, and a hanging ring is arranged on the locking block. The horizontal adjusting device assembly comprises a hoisting ring, a plurality of chains arranged below the hoisting ring and an adjusting block with one end connected to the chains, and the other end of the adjusting block is connected to the hoisting ring, so that hoisting of different stages of impellers can be met, the level of the impellers can be adjusted, the cost of the hoisting device is reduced, and the assembly precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbines, and in particular to a horizontally adjustable single-stage compressor impeller hoisting device and an adjustment method. Background Art

[0002] Gas turbine rotors typically utilize a circumferential tie-rod structure, whereby multiple tie-rod bolts, evenly distributed around the circumference, compress the individual impellers together to form a complete rotor. This core component of the gas turbine is widely used due to its advantages such as light weight, high strength, flexible impeller material selection, and ease of processing and assembly.

[0003] The pull rod rotor is assembled vertically. On the rotor special assembly platform, the impellers of each stage are stacked in sequence, and then the impellers of each stage are tightened by the pull rod bolts. The assembly quality of the impeller has a direct impact on the final rotor assembly accuracy. It is usually required that the end face parallelism of the impeller after assembly is less than 0.01mm. This requires that the impellers must also have good levelness when stacking, otherwise the assembly accuracy will be affected.

[0004] The compressor rotor is a critical section of the combustion turbine rotor. During assembly, the annular surfaces where the tie rod holes are located are tightly pressed together, leaving a very small gap between the outer rings of the impellers. This leaves no room for lifting equipment, making lifting difficult. When manufacturing lifting tools, the sizes of the impellers at each stage vary. If a separate lifting device were manufactured for each stage, the cost would be very high. Each impeller stage is interference-positioned using an intermediate stop. If the impellers are not properly leveled during assembly, this will not only affect the assembly schedule but also the final rotor assembly accuracy. Therefore, a lifting device that is easy to lift, has low installation costs, and can adjust the impeller level is required. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a single-stage compressor impeller lifting device and adjustment method with adjustable level, which can not only meet the lifting needs of impellers of different stages, but also adjust the level of the impeller, reducing the cost of the lifting device and improving the assembly accuracy.

[0006] The present invention adopts the following technical solutions: A horizontally adjustable single-stage compressor impeller lifting device comprises an impeller, a horizontal adjustment device assembly and a fixing device assembly; inclined impeller grooves are equidistantly arranged on the circumferential surface of the impeller, and blades are provided on the impeller grooves; the fixing device assembly comprises a locking block arranged in the impeller groove, and a lifting ring is provided on the locking block; the horizontal adjustment device assembly comprises a lifting ring, a plurality of chains arranged below the lifting ring, and an adjusting block with one end connected to the chain, and the other end of the adjusting block is connected to the lifting ring.

[0007] Preferably, a hook is provided at each end of the adjusting block, and the two ends of the adjusting block are respectively suspended on the chain and the ring through the hooks.

[0008] Preferably, the hook is connected to the adjusting block via a thread, and when the hook and the adjusting block rotate relative to each other, the length of the hook extending from the adjusting block changes.

[0009] Preferably, the impeller groove is a dovetail groove structure, and protrusions matching the dovetail groove are provided at both ends of the locking block.

[0010] Preferably, the locking block is provided with three threaded holes, two of the threaded holes are threadedly fitted with locking bolts, the locking bolts rest against the bottom of the dovetail groove and cause the protrusion of the locking block to be pressed tightly against the wall of the dovetail groove through the reaction force.

[0011] Preferably, the impeller is provided with an impeller level measuring device.

[0012] Preferably, the impeller has a mounting hole in the middle, and the impeller level measuring device includes a fixed bracket rotatably engaged with the mounting hole, a clamp capable of moving up and down relative to the fixed bracket, a guide rail arranged on the clamp, and a dial indicator located on the guide rail.

[0013] Preferably, the clamp is connected to the fixing bracket via a fixing screw; and the dial indicator is mounted on the guide rail via a dial indicator mounting base.

[0014] A method for adjusting the level of a single-stage compressor impeller hoisting is applicable to a hoisting device for a single-stage compressor impeller with adjustable level, comprising the following steps: S1: arranging blades on the impeller groove of the impeller, and removing three of the blades at equal intervals; S2: inserting the locking blocks of the fixing device assembly into the three vacant impeller grooves, and pressing against the bottom of the impeller groove through the locking bolts, and causing the protrusions (5-3-1) of the locking block to be tightly pressed against the wall of the impeller groove through the reaction force; S3: arranging three chains on the lower surface of the lifting ring, and arranging a hook at each end of the adjusting block, and the two hooks are respectively connected to the lifting ring and the lifting ring; S4: inserting an iron rod into the middle of the adjusting block, and rotating the hook and the adjusting block clockwise or counterclockwise to adjust the thread matching length, thereby achieving height adjustment of the impeller; S5: assembling the impeller after horizontal adjustment, disassembling the horizontal adjustment device assembly and the fixing device assembly after assembly, and reinstalling the three blades originally disassembled.

[0015] Preferably, the S4 also includes setting a fixed bracket in the middle of the impeller, installing the guide rail on the fixed bracket through a clamp, and adjusting the position of the dial indicator on the guide rail; rotating the fixed bracket and reading the value displayed by the dial indicator, and judging the height state of the impeller based on the change of the dial indicator value.

[0016] Compared with the prior art, the present invention has the following advantages: the present invention provides a horizontally adjustable single-stage compressor impeller lifting device, comprising an impeller, a horizontal adjustment device assembly and a fixing device assembly; through the horizontal adjustment device assembly and the fixing device assembly, the difficulty of not being able to lift the impeller in a narrow space is overcome, and at the same time, it has the function of horizontal adjustment, which greatly improves the assembly accuracy of the pull-rod rotor. By simply adjusting the size of the dovetail locking block, the lifting of impellers of different sizes can be achieved. It has wide applicability and convenience, and is low in cost, and is particularly suitable for the assembly of compressor impellers with a pull-rod rotor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the stacked multi-stage compressor impellers.

[0018] Figure 2 This is a schematic diagram of the structure of the single-stage compressor impeller lifting device.

[0019] Figure 3 It is a schematic diagram of the structure of the horizontal adjustment device assembly.

[0020] Figure 4 Schematic diagram of the fixing device assembly structure.

[0021] Figure 5 It is a structural diagram of the locking block.

[0022] Figure 6 Schematic diagram of impeller horizontal measurement.

[0023] Figure 7 This is a schematic diagram of the assembly structure of the impeller level measurement device.

[0024] In the figure, impeller 1, impeller groove 1-1, mounting hole 1-2, pull rod bolt 2, blade 3, level adjustment device assembly 4, lifting ring 4-1, lifting eye screw 4-2, chain 4-3, hook 4-4, adjustment block 4-5, fixing device assembly 5, lifting ring 5-1, locking bolt 5-2, locking block 5-3, protrusion 5-3-1, impeller level measuring device 6, fixing bracket 6-1, fixing screw 6-2, clamp 6-3, adjusting screw 6-4, dial indicator mounting base 6-5, guide rail 6-6, dial indicator 6-7. DETAILED DESCRIPTION

[0025] In order to facilitate understanding of the technical solution of the present invention, the following is a detailed description with reference to the accompanying drawings and specific embodiments.

[0026] Example 1 like Figure 1-5 As shown, a horizontally adjustable single-stage compressor impeller lifting device includes an impeller 1, a horizontal adjustment device assembly 4, and a fixing device assembly 5; The impeller 1 has inclined impeller grooves 1-1 arranged at equal intervals on its circumferential surface. The impeller grooves 1-1 are provided with blades 3, which are connected to the impeller grooves 1-1 via tie rod bolts 2. The fixing device assembly 5 includes a locking block 5-3 arranged in the impeller groove 1-1, and a lifting ring 5-1 is provided on the locking block 5-3; The level adjustment device assembly 4 includes a lifting ring 4-1, several chains 4-3 arranged below the lifting ring 4-1, and an adjustment block 4-5 with one end connected to the chain 4-3 and the other end of the adjustment block 4-5 connected to the lifting ring 5-1. The chain 4-3 is connected to the bottom of the lifting ring 4-1 via eyebolts 4-2.

[0027] The two ends of the adjusting block 4-5 are respectively provided with a hook 4-4, and the two ends of the adjusting block 4-5 are respectively hung on the chain 4-3 and the ring 5-1 through the hooks 4-4, which is convenient for connection and disassembly.

[0028] The hook 4-4 is connected to the adjusting block 4-5 by a thread. When the hook 4-4 and the adjusting block 4-5 rotate relative to each other, the length of the hook 4-4 extending out of the adjusting block 4-5 changes. In this embodiment, when the hook 4-4 rotates clockwise relative to the adjusting block 4-5, the length of the hook 4-4 extending out of the adjusting block 4-5 increases, and the position of the impeller 1 in this direction decreases, and vice versa.

[0029] Among them, the adjustment block 4-5 is a runway-type structure, which is through in the middle and has threads at both ends. The lower end of the hook 4-4 has a threaded column. When in use, it needs to be placed in the adjustment block 4-5 through an adjustment piece, and the adjustment piece is connected to the threaded column. By rotating the adjustment piece, the threaded column can be rotated to achieve the change in the length of the hook 4-4 extending out of the adjustment block 4-5.

[0030] The impeller groove 1-1 is a dovetail groove structure, and both ends of the locking block 5-3 are provided with protrusions 5-3-1 that match the dovetail groove. The locking block 5-3 is provided with three threaded holes 5-3-1, and two of the threaded holes 5-3-1 are threadedly matched with locking bolts 5-2. The locking bolts 5-2 are against the bottom of the dovetail groove and cause the protrusions 5-3-1 of the locking block 5-3 to be tightly pressed against the wall of the dovetail groove through the reaction force, thereby preventing the locking block 5-3 from falling off from the impeller groove 1-1 through friction.

[0031] like Figure 6-7As shown, the impeller 1 is provided with an impeller level measuring device 6. The impeller 1 has a mounting hole 1-2 in the middle. The impeller level measuring device 6 includes a fixed bracket 6-1 that rotatably engages the mounting hole 1-2, a clamp 6-3 that can move up and down relative to the fixed bracket 6-1, a guide rail 6-6 disposed on the clamp 6-3, and a dial indicator 6-7 located on the guide rail 6-6. The clamp 6-3 is connected to the fixed bracket 6-1 via a fixing screw 6-2; the dial indicator 6-7 is mounted on the guide rail 6-6 via a dial indicator mounting base 6-5. During use, the fixed bracket 6-1 is rotated and the value displayed by the dial indicator 6-7 is read. Based on the change in the value of the dial indicator 6-7, the height of the impeller 1 can be determined.

[0032] A method for adjusting the level of a single-stage compressor impeller hoisting includes the following steps: S1: Install blades 3 on the impeller groove 1-1 of the impeller 1, and remove three of the blades 3 at equal intervals; S2: Insert the locking block 5-3 of the fixing device assembly 5 into the three vacant impeller grooves 1-1, and use the locking bolt 5-2 to press against the bottom of the impeller groove 1-1. The reaction force causes the protrusion 5-3-1 of the locking block 5-3 to be pressed tightly against the wall of the impeller groove 1-1. S3: Set three chains 4-3 on the lower surface of the lifting ring 4-1 and adjust the block 4-5 A hook 4-4 is provided at each end, and the two hooks 4-4 are connected to the lifting ring 4-1 and the lifting ring 5-1 respectively; S4: Insert an iron rod into the middle of the adjusting block 4-5, and rotate the hook 4-4 and the adjusting block 4-5 clockwise or counterclockwise to adjust the length of the thread fit, thereby achieving the height adjustment of the impeller 1; S5: After the horizontal adjustment, the impeller 1 is assembled. After assembly, the horizontal adjustment device assembly 4 and the fixing device assembly 5 are disassembled, and the three blades 3 that were originally disassembled are reinstalled.

[0033] The S4 also includes setting a fixed bracket 6-1 in the middle of the impeller 1, installing the guide rail 6-6 on the fixed bracket 6-1 through the clamp 6-3, adjusting the position of the dial indicator 6-7 on the guide rail 6-6; rotating the fixed bracket 6-1 and reading the value displayed by the dial indicator 6-7, and judging the high and low state of the impeller 1 according to the change of the value of the dial indicator 6-7.

[0034] The above are only preferred embodiments of the present invention. The scope of protection of the present invention shall be based on the scope defined by the claims. Several improvements and modifications made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as the scope of protection of the present invention.

Claims

1. A horizontally adjustable single-stage compressor impeller hoisting device, characterized in that: The invention comprises an impeller (1), a horizontal adjustment device assembly (4) and a fixing device assembly (5); the impeller (1) is provided with inclined impeller grooves (1-1) at equal intervals on its circumferential surface, and the impeller grooves (1-1) are provided with blades (3); the fixing device assembly (5) comprises a locking block (5-3) provided in the impeller groove (1-1), and the locking block (5-3) is provided with a lifting ring (5-1); the horizontal adjustment device assembly (4) comprises a lifting ring (4-1), a plurality of chains (4-3) provided below the lifting ring (4-1), and an adjustment block (4-5) with one end connected to the chain (4-3), and the other end of the adjustment block (4-5) is connected to the lifting ring (5-1).

2. The horizontally adjustable single-stage compressor impeller hoisting device according to claim 1, characterized in that: A hook (4-4) is provided at each end of the regulating block (4-5), and the ends of the regulating block (4-5) are respectively suspended on the chain (4-3) and the hanging ring (5-1) via the hooks (4-4).

3. The adjustable level single-stage compressor impeller hoisting device according to claim 2, characterized in that: The hook (4-4) is connected to the adjustment block (4-5) via a threaded connection. When the hook (4-4) and the adjustment block (4-5) rotate relative to each other, the length of the hook (4-4) extending from the adjustment block (4-5) changes.

4. The horizontally adjustable single-stage compressor impeller hoisting device according to claim 1, characterized in that: The impeller groove (1-1) is a dovetail groove structure, and protrusions (5-3-1) matching the dovetail groove are provided at both ends of the locking block (5-3).

5. The horizontally adjustable single-stage compressor impeller hoisting device according to claim 4, characterized in that: The locking block (5-3) is provided with three threaded holes (5-3-1), two of the threaded holes (5-3-1) are threadedly fitted with locking bolts (5-2), the locking bolts (5-2) abut against the bottom of the dovetail groove and, through a reaction force, cause the protrusion (5-3-1) of the locking block (5-3) to be tightly pressed against the wall surface of the dovetail groove.

6. The horizontally adjustable single-stage compressor impeller hoisting device according to claim 1, characterized in that: The impeller (1) is provided with an impeller level measuring device (6).

7. The horizontally adjustable single-stage compressor impeller hoisting device according to claim 6, characterized in that: The impeller (1) has a mounting hole (1-2) in the middle, and the impeller level measuring device (6) comprises a fixed bracket (6-1) rotatably engaged with the mounting hole (1-2), a clamp (6-3) capable of moving up and down relative to the fixed bracket (6-1), a guide rail (6-6) provided on the clamp (6-3), and a dial indicator (6-7) located on the guide rail (6-6).

8. The horizontally adjustable single-stage compressor impeller hoisting device according to claim 7, characterized in that: The clamp (6-3) is connected to the fixed bracket (6-1) via a fixing screw (6-2); the dial indicator (6-7) is installed on the guide rail (6-6) via a dial indicator mounting seat (6-5).

9. A method for adjusting the level of a single-stage compressor impeller hoisting, characterized in that: The horizontally adjustable single-stage compressor impeller hoisting device applicable to any one of claims 1 to 8 comprises the following steps: S1: Arrange blades (3) on the impeller groove (1-1) of the impeller (1), and remove three of the blades (3) at equal intervals; S2: Insert the locking block (5-3) of the fixing device assembly (5) into the three vacant impeller grooves (1-1), and press the locking bolt (5-2) against the bottom of the impeller groove (1-1) and cause the protrusion (5-3-1) of the locking block (5-3) to be pressed against the wall of the impeller groove (1-1) through the reaction force; S3: Three chains (4-3) are arranged on the lower surface of the lifting ring (4-1), and a hook (4-4) is arranged at each end of the adjustment block (4-5), and the two hooks (4-4) are respectively connected to the lifting ring (4-1) and the lifting ring (5-1); S4: insert an iron rod into the middle of the adjusting block (4-5), and rotate the hook (4-4) and the adjusting block (4-5) clockwise or counterclockwise to adjust the length of the thread fit, thereby achieving the height adjustment of the impeller (1); S5: After the horizontal adjustment, assemble the impeller (1). After assembly, disassemble the horizontal adjustment device assembly (4) and the fixing device assembly (5), and reinstall the three blades (3) that were originally disassembled.

10. The method for adjusting the level of a single-stage compressor impeller according to claim 9, characterized in that: The S4 further includes arranging a fixed bracket (6-1) in the middle of the impeller (1), installing the guide rail (6-6) on the fixed bracket (6-1) through a clamp (6-3), adjusting the position of the dial indicator (6-7) on the guide rail (6-6); rotating the fixed bracket (6-1) and reading the value displayed by the dial indicator (6-7), and judging the height state of the impeller (1) based on the change of the value of the dial indicator (6-7).

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